title: [Assessing common factors in psychotherapy: psychometric properties of a new time-economic instrument (WIFA-k)].
abstract: Research on common and differential factors in the therapeutic process is impeded by the lack of instruments suitable for assessing common change mechanisms. This study presents the psychometric properties of a newly developed time-economic instrument (WIFA-k), which was designed to assess common factors of psychotherapy as designed by Grawe. Within a multi-center study comparing the efficacy of cognitive therapy and psychodynamic therapy in the treatment of social phobia, 6 raters assessed 25 randomly selected, videotaped therapy sessions of each treatment approach, and evaluated common factors using the Wifa-k. Interrater-reliability was found to be high for the items "resource activation", "motivational clarification" and "mastery" and low for the items "therapeutic relationship" and "problem activation". Ways to increase reliability and validity of the scale are discussed.
authors.affiliation: Klinische Psychologie und Psychotherapie, Goethe Universität, Frankfurt. consbruch@psychologie.tudresden.de
authors.forename: Katrin
authors.initials: K
authors.lastname: von Consbruch
authors.forename: Christoph
authors.initials: C
authors.lastname: Flückiger
authors.forename: Ulrich
authors.initials: U
authors.lastname: Stangier
authors.forename: Manfred E
authors.initials: ME
authors.lastname: Beutel
authors.forename: Stephan
authors.initials: S
authors.lastname: Herpertz
authors.forename: Jürgen
authors.initials: J
authors.lastname: Hoyer
authors.forename: Erik
authors.initials: E
authors.lastname: Leibing
authors.forename: Falk
authors.initials: F
authors.lastname: Leichsenring
authors.forename: Simone
authors.initials: S
authors.lastname: Salzer
authors.forename: Bernhard
authors.initials: B
authors.lastname: Strauß
authors.forename: Jörg
authors.initials: J
authors.lastname: Wiltink
mesh_terms: D006801:Humans; D015588:Observer Variation; D010698:Phobic Disorders / Q000523:psychology / Q000628:therapy; D011369:Professional-Patient Relations; D011594:Psychometrics / Q000379:methods*; D011613:Psychotherapy / Q000191:economics* / Q000379:methods*; D015203:Reproducibility of Results; D014741:Video Recording